<script setup>
// script setup 语法糖
const msg = 'Hello Vue3!!!'
const changeMsg = () => {
  alert('点击按钮啦')
  }
</script>
<template>
  <h1>hello vue3</h1>
  <h2>{{ msg }}</h2>
  <p>真棒</p>
  <button @click="changeMsg()">点击按钮</button>
</template>
<style></style>
